23521080613 has 4 divisors (see below), whose sum is σ = 24094765548. Its totient is φ = 22947395680.

The previous prime is 23521080601. The next prime is 23521080623. The reversal of 23521080613 is 31608012532.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6441988644 + 17079091969 = 80262^2 + 130687^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23521080613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23521080623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286842406 + ... + 286842487.

It is an arithmetic number, because the mean of its divisors is an integer number (6023691387).

Almost surely, 2^23521080613 is an apocalyptic number.

It is an amenable number.

23521080613 is a deficient number, since it is larger than the sum of its proper divisors (573684935).

23521080613 is an equidigital number, since it uses as much as digits as its factorization.

23521080613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573684934.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 23521080613 in words is "twenty-three billion, five hundred twenty-one million, eighty thousand, six hundred thirteen".